I finally got my unit(s) and it works but coil whine is kind of annoying on some scenarios, like on demons souls character creation screen and beginning of bugsnax it were annoyingly loud. (not literally loud, but too noisy)
I believed that people with "silent" ps5 are lying, living in really noisy apartment or are deaf, and I were right again.
Fan is not loud, but it is definitely easily audible from +5m away, even when it downloaded stuff on rest mode and it is/were spinning.
More quiet than I hoped for, but not "silent" as fans always make some noise and in non-noisy apartment any console, even switch, is audible while gaming from far away. But definitely much quieter than any PS4 I have heard.
The coil whine is the annoying part, as it is like R R R R R r r r r kind of continuing but non constant noise.
And fan have tiny bit of noise like it touches something while spinning, gotta try it on horizontal tomorrow
Is it hardware fault, probably not as it is typical that every modern console make audible noise, is it perfect? no